package com.lzy.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    /**
     * 正常访问，肯定ok
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {

        return "线程池： " + Thread.currentThread().getName() + "paymentInfo_OK,id=" + id + "\t" + "O(∩_∩)O";
    }

    /**
     * 正常访问，肯定ok
     *
     * @param id
     * @return
     */
    //降级处理，5秒内正常执行，大于5秒或异常-降级处理
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id) {

        int timeNumber = 3;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
//        int timeNumber = 10/0;
        return "线程池： " + Thread.currentThread().getName() + "paymentInfo_TimeOut,id=" + id
                + "\t" + "O(∩_∩)O" + "耗时" + timeNumber + "秒";
    }

    private String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池： " + Thread.currentThread().getName() + "8001系统繁忙或运行报错,id=" + id
                + "\t" + "/(ㄒoㄒ)/~~" ;
    }

    //=========服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"), // 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"), //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"), //时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"), //失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id)
    {
        if(id < 0)
        {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id)
    {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }

}
